Instant Resistor Color Code Chart & Calculator for Ohm Value Decoding
Quickly identify resistor values with our comprehensive resistor color code calculator and chart. Learn how to read 4, 5, and 6 band resistor color codes accurately. Free and easy to use for electronics enthusiasts and professionals.
Quick Resistor Color Code Reference
Click on any color to see its corresponding value
Explore Our Resistor Color Code Calculator and Chart
Instantly calculate resistor values by selecting color bands. Supports 4, 5, and 6 band resistors.
Detailed and printable chart for quick reference. Available in image and PDF formats.
Learn how to easily read and understand resistor color codes with our tutorial.
Quickly find color codes for common resistor values like 1k, 10k, 100 Ohm, and more.
Access our tools on any device, completely free of charge.
Quick Guide: How to Use Our Resistor Color Code Tools
Visit the Resistor Color Code Calculator
Go to our interactive calculator page.
Select the Color Bands
Choose the colors of your resistor's bands (4, 5, or 6 bands).
Get Instant Results
Instantly see the calculated resistance value and tolerance.
Explore the Resistor Color Code Chart
Refer to our comprehensive chart for color code details.
Learn to Read the Codes
Master resistor color coding with our step-by-step guide.
Quickly Find Color Codes for Common Resistor Values
Frequently asked questions
Do you have any questions? We have got you covered.
How do I read a resistor's color code?
To read a resistor's color code, start from the band closest to the edge and read towards the center. Each color represents a number - the first two or three bands form the significant digits, while the multiplier band determines how many zeros to add. The last band indicates the tolerance.
What's the difference between 4, 5, and 6 band resistors?
4-band resistors have two significant digits, a multiplier, and tolerance. 5-band resistors add a third significant digit for more precision. 6-band resistors include a temperature coefficient band in addition to the 5 bands, indicating how the resistance changes with temperature.
How accurate is the resistor calculator?
Our resistor calculator provides precise values based on the standard color code system. The actual resistance may vary within the tolerance range indicated by the last band (typically ±1%, ±2%, or ±5% for common resistors).
Why do resistors use color codes?
Color codes are used on resistors because they provide a standardized, easy-to-read system for marking resistance values on small components. This international standard allows for quick identification without needing to print tiny numbers on the resistor body.
How do I find specific resistor values?
You can use our calculator by selecting the colored bands that match your resistor, or browse our quick reference guides for common values like 1kΩ, 10kΩ, or 100Ω. We also provide a comprehensive color code chart for manual lookup.